JP3406143B2 - Pipe inner surface joining device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe inner surface joining apparatus. 2. Description of the Related Art As a joining device for joining tubes such as resin tubes, there is known an inner surface joining device in which tubes to be joined are clamped from an inner surface so that the tubes are attracted to each other. Such an inner surface joining apparatus is particularly advantageous in a case where the pipe to be joined does not need to be clamped from the outer surface, so that the pipe is laid inside a pipeline laying pit. [0003] As this inner surface joining device, for example, there is one disclosed in Japanese Patent Application Laid-Open No. 7-139661. This device is provided with a first bag body that can freely expand and contract on a first carriage that can run inside a first pipe to be joined to each other, and a first cart that can run inside a second pipe. The second carriage is provided with a second bag body which can be freely expanded and contracted, and further provided with a cylinder device for drawing the first and second bag bodies together with the first and second carriages. [0004] With such a configuration, the first carriage and the first bag body are positioned within the end of the first tube by running the two carriages, and the second carriage and the second bag body are moved. By inflating these bag bodies in a state where they are located within the end of the second tube, the first bag body
The inner surface of the tube is retained and the second bag body
The inner surface of the tube is retained. Then, by operating the cylinder device to draw the first and second bag bodies together with the first and second carriages, the two pipes are brought closer to each other and joined. [0005] However, such a conventional vehicle has a structure in which each of the vehicles has a pair of trolleys which can travel freely, and these trolleys are connected by a cylinder device. There is a problem that the structure is not simple and that it is difficult to perform an easy operation when traveling in a pipe. Also, at the time of joining the pipes, it is necessary to pull both carts toward each other and move them relatively,
In that respect, there is a problem that the operation is not easy. SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve such a problem and to obtain an apparatus for joining an inner surface of a pipe which has a simpler structure and is easier to operate than the conventional one. [0007] SUMMARY OF THE INVENTION To achieve this object the present invention includes a movable carriage inside the tube in the axial direction of the pipe, before
Provided on the trolley and arranged along the inner circumference of the first tube.
A first ring placed thereon and an outer periphery of the first ring.
It is provided to be able to stretch and contract, and
A first bag body that can be pressed against the inner surface of the first tube;
A second ring disposed along the inner circumference of the second tube;
The second ring is provided so as to be able to expand and contract on the outer periphery thereof.
And this expansion presses against the inner surface of the second tube.
A possible second bag body, provided on said second ring
And a pair of frames, projecting from the carriage in the axial direction of the pipe.
A pair of arms provided, and
The second ring by supporting the pair of frames.
Support rollers that allow the tube to move freely in the axial direction of the pipe
If, attracted the first bag member capable drawn in the axial direction of the first ring <br/> and the second mutually tube and said second ring bag body formed provided Means. With such a configuration, the first bag body
A first ring provided with a second bag body is provided.
And a second ring provided on one carriage, and the first ring
Since the structure is such that the ring and the second ring can only be pulled toward each other, the structure is simple, and furthermore, the bogie does not move at the time of joining the pipes. Since the entire device can be moved to a required joining place only by traveling, the operation is easy. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIGS.
Is a pair of horizontal pipes joined to each other, and is constituted by, for example, a resin pipe such as an FRPM pipe. A receiving port 3 is formed at an end of one tube 1, and an insertion port 4 that can be inserted into the receiving port 3 is formed at an end of the other tube 2. An annular rubber sealing material 5 is attached to the inner periphery of the receiving port 3 by bonding or the like, and the sealing material 5 is compressed by the insertion of the insertion port 4 into the receiving port 3 so that the receiving port 3 is compressed. The required sealing function is provided between the insertion openings. Reference numeral 11 denotes an inner surface joining device based on the present invention. The inner surface joining device 11 has a carriage 12, and the carriage 12
Is provided with idle wheels 13 and running wheels 14 so that the pipe 1,
2 can run in the axial direction of the pipe. Reference numeral 15 denotes a motor, which can apply a traveling force to the traveling wheels 14 via a chain or the like. At one end of the carriage 12, a pair of arms 16, 16 protruding in the axial direction of the tube are provided. These arms 16 and 16 are each formed of a hollow body having a rectangular cross section, and on the upper surface thereof, a number of support rollers 17 that are freely rotatable around an axis perpendicular to the axial direction of the tube are provided. ing. The carriage 12 is provided with a ring 18 arranged along the inner circumference of the tubes 1 and 2. The ring 18 is fixed to the carriage 12 by appropriate means. Also arm
At positions 16 and 16, another ring 19 is provided along the inner circumference of the tubes 1 and 2 like the ring 18. The ring 19 is provided with a pair of frames 20, 20, and these frames 20, 20 are configured to cover the arms 16, 16. That is, the arms 16, 16 are arranged so as to pass through the inside of the frames 20, 20, and the upper plate constituting these frames 20, 20
The ring 19 is configured to be supported by the arms 16, 16 by supporting the lower surfaces of the support rollers 17. In addition, the ring 19 has the frame body 20,
Arm 20 is supported by support roller 17
It is free to move in the axial direction of the tube along 6,16. A pair of cylinder devices 22, 22 are provided between the rings 18, 19 as pulling means. These cylinder devices 22, 22 are provided at positions every 180 degrees along the circumferential direction of the rings 18, 19 so as to be extendable and contractible in the axial direction of the pipe, and one end and the other end thereof are connected to a connecting member 23. , 23 are connected to the inner surfaces of the rings 18, 19, respectively. Each of the rings 18 and 19 has a concave cross-sectional shape, and a concave-shaped outer peripheral groove 24 based on the concave shape is formed over the entire circumference. And these rings
Bag bodies 25, 26 are accommodated in outer peripheral grooves 24, 24 of 18, 19, respectively. These bag bodies 25, 26 have outer peripheral grooves 24,
Formed by a tubular annular rubber body or the like arranged along 24, the cross section is configured to be able to expand and contract freely. A water pump 27 is provided on the carriage 12, and the water pump 27 is connected to the bag body 25 through a hose 28.
It is possible to supply pressurized water into the inside 26 and to discharge water inside the bag bodies 25 and 26. A hydraulic pump 29 for operating the cylinder device 22 is provided on the carriage 12. A hose 30 connects the hydraulic pump 29 and the cylinder device 22 to each other. Further, a power supply operation box 32 is provided on the cart 12. This power operation box 32
Is used to control the water pump 27, the hydraulic pump 29, the motor 15, and the like. In such a configuration, when the tubes 1 and 3 are joined to each other, the two tubes 1 and 3 are brought close to each other in advance as shown in FIG. Here, it is assumed that the pipe 1 has already been laid and the new pipe 2 is joined to the laid pipe 1. As shown, when the bag bodies 25 and 26 are contracted, the inner peripheral surfaces of the tubes 1 and 2 and the bag bodies
A gap 35 is formed between 25 and 26. In this state, the cart 12 is driven by the drive of the motor 15 in a state where the bag bodies 25 and 26 are contracted, for example, toward the joint with the pipe 2 inside the pipe 1. At this time, the ring 19 is supported by the arms 16, 16, and the two rings 18, 19, and other equipment can be easily moved to the joint at once simply by running the single carriage 12. . When the idle wheel 13 reaches the vicinity of the receiving port 3 as shown in FIG. 1, the carriage 12 stops running. When the cylinder device 22 is extended by the hydraulic pump 29, the ring
The ring 19 is supported and guided by the support rollers 17 of the arms 16 and 16 and is pushed forward, and the ring 19 is inserted into the insertion opening 4. The state at this time is shown in FIG. Next, the water pump 27 is operated to supply pressurized water into both of the bag bodies 25 and 26. Then, the bag bodies 25 and 26 are inflated in a state of being accommodated in the outer peripheral groove 24 having a concave cross section, whereby the bag body 25 is pressed against the inner peripheral surface of the pipe 1 and the bag body 26 is pressed. Is pressed against the inner peripheral surface of the tube 2. As a result, the inner peripheral surfaces of the tubes 1 and 2 are held by the bag bodies 25 and 26, respectively, as shown in FIG. Thereafter, when the cylinder device 22 is shortened,
When the bag body 25 of the ring 18 is held on the inner peripheral surface of the tube 1, the carriage 12 and the arms 16, 16 stop at that position, so that the ring 19 moves closer to the ring 18. Therefore, the tube 2 held by the bag body 26 of the ring 19 approaches the tube 1, and as shown in FIG.
Is inserted into the socket 3. At this time, the ring 19, the bag body 26 and the insertion opening 4 are connected to the arm 1 via the support roller 17.
The support roller 17 is smoothly moved on the support roller 17 by idle rotation of the support roller 17. Further, it is only necessary to move the ring 19 and the bag body 26, and there is no need to move the carriage 12, so that the operation can be performed easily. Thus, the insertion of the insertion port 4 and the compression of the sealing material 5 between the reception port insertion are performed, and the joining operation of the pipes 1 and 2 is completed. Therefore, the water pump 27
By discharging the pressurized water in the tubes 25 and 26 to the outside, the bags 25 and 26 are contracted and separated from the inner peripheral surfaces of the tubes 1 and 2. As a result, the carriage 12 can travel in the pipe again, and is moved toward the next joint. In the above description, both rings 18,
Although the cylinder device 22 has been illustrated as a means for pulling the bag bodies 25 and 26 together in the axial direction of the tube via the 19, other suitable devices may be used. In the above description, the bag bodies 25 and 26 are configured by annular tubular bodies. However, the bag bodies 25 and 26 may be dispersedly arranged at a plurality of positions in the circumferential direction. [0021] According to the present invention as described above, according to the present invention, first the carriage
A first ring is provided, and a second ring is supported by a pair of arms provided so as to protrude from the cart .
A first bag body provided in one ring, and a second bag body
A first bag and a second bag are provided by a second bag body provided on the ring .
And the ring
Since the structure is such that they can be pulled toward each other in the axial direction of the pipe , a simple configuration can be achieved, and there is no need to move the bogie during the joining operation. Since the entire apparatus can be moved to a required joining place only by traveling, the operation can be easily performed.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view showing a state in which a pipe inner surface joining apparatus according to the present invention is arranged in a pipe. FIG. 2 is a cross-sectional view of a portion shown in FIG. FIG. 3 is a schematic longitudinal sectional view showing an operation state of the pipe inner surface joining apparatus of FIG. 1; FIG. 4 is a schematic longitudinal sectional view showing a state next to FIG. 3; FIG. 5 is a schematic longitudinal sectional view showing a state next to FIG. 4; [Description of Signs] 1 pipe 2 pipe 12 cart 16 arm 22 cylinder device 25 bag body 26 bag body

Continuation of the front page (56) References JP-A-7-139661 (JP, A) JP-A-3-7587 (JP, U) JP-A-3-39681 (JP, U) JP-A 63-4277 (JP) , U) Jikken 50-3928 (JP, Y1) (58) Fields investigated (Int. Cl. ⁷ , DB name) F16L 1/00 F16L 25/00 F16L 1/02

Claims (1)

(57) [Claim 1] A bogie movable in the pipe in the axial direction of the pipe, and a bogie provided on the bogie and extending along an inner periphery of the first pipe.
A first ring arranged outside the first ring
It is provided around the circumference so that it can expand and contract freely.
First bag pressable against the inner surface of the first tube by
A body and a second ring disposed along the inner circumference of the second tube
And an inflatable and contractible outer periphery of the second ring.
And the inner surface of the second tube
A second bag body which can be pressed into contact with the second ring;
Projecting in the axial direction of the tube from the pair of
And a pair of arms provided to
The second frame is provided to support the pair of frames.
Numerous support holes to move the ring in the axial direction of the tube
And the first refill provided with the first bag body.
The second phosphorus the the ring second bag member is provided
Inner surface bonding apparatus of the tube and having a drawn means capable attract and grayed in the axial direction of the tube together.